Forward the SignalFirstPacketReceived to RtpReceiver.

webrtc/api/rtpreceiver.h

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 // This file contains classes that implement RtpReceiverInterface.
 // An RtpReceiver associates a MediaStreamTrackInterface with an underlying
 // transport (provided by AudioProviderInterface/VideoProviderInterface)
 
 #ifndef WEBRTC_API_RTPRECEIVER_H_
 #define WEBRTC_API_RTPRECEIVER_H_
 
 #include <string>
 
 #include "webrtc/api/mediastreamprovider.h"
 #include "webrtc/api/rtpreceiverinterface.h"
 #include "webrtc/api/remoteaudiosource.h"
 #include "webrtc/api/videotracksource.h"
 #include "webrtc/base/basictypes.h"
+#include "webrtc/base/sigslot.h"
 #include "webrtc/media/base/videobroadcaster.h"
 
 namespace webrtc {
 
 class AudioRtpReceiver : public ObserverInterface,
                          public AudioSourceInterface::AudioObserver,
-                         public rtc::RefCountedObject<RtpReceiverInterface> {
+                         public rtc::RefCountedObject<RtpReceiverInterface>,
+                         public sigslot::has_slots<> {
  public:
   AudioRtpReceiver(MediaStreamInterface* stream,
                    const std::string& track_id,
                    uint32_t ssrc,
                    AudioProviderInterface* provider);
 
   virtual ~AudioRtpReceiver();
 
   // ObserverInterface implementation
   void OnChanged() override;
@@ skipping 10 matching lines @@
     return track_.get();
   }
 
   std::string id() const override { return id_; }
 
   void Stop() override;
 
   RtpParameters GetParameters() const override;
   bool SetParameters(const RtpParameters& parameters) override;
 
+  void SetObserver(RtpReceiverObserverInterface* observer) override;
+
  private:
   void Reconfigure();
+  void OnFirstAudioPacketReceived();
 
   const std::string id_;
   const uint32_t ssrc_;
   AudioProviderInterface* provider_;  // Set to null in Stop().
   const rtc::scoped_refptr<AudioTrackInterface> track_;
   bool cached_track_enabled_;
+  RtpReceiverObserverInterface* observer_;

[pthatcher1, 2016/06/08 17:35:55]

observer_ = nullptr;  

?

+  bool received_first_packet_ = false;
 };
 
-class VideoRtpReceiver : public rtc::RefCountedObject<RtpReceiverInterface> {
+class VideoRtpReceiver : public rtc::RefCountedObject<RtpReceiverInterface>,
+                         public sigslot::has_slots<> {
  public:
   VideoRtpReceiver(MediaStreamInterface* stream,
                    const std::string& track_id,
                    rtc::Thread* worker_thread,
                    uint32_t ssrc,
                    VideoProviderInterface* provider);
 
   virtual ~VideoRtpReceiver();
 
   rtc::scoped_refptr<VideoTrackInterface> video_track() const {
     return track_.get();
   }
 
   // RtpReceiverInterface implementation
   rtc::scoped_refptr<MediaStreamTrackInterface> track() const override {
     return track_.get();
   }
 
   std::string id() const override { return id_; }
 
   void Stop() override;
 
   RtpParameters GetParameters() const override;
   bool SetParameters(const RtpParameters& parameters) override;
 
+  void SetObserver(RtpReceiverObserverInterface* observer) override;
+
  private:
+  void OnFirstVideoPacketReceived();
+
   std::string id_;
   uint32_t ssrc_;
   VideoProviderInterface* provider_;
   // |broadcaster_| is needed since the decoder can only handle one sink.
   // It might be better if the decoder can handle multiple sinks and consider
   // the VideoSinkWants.
   rtc::VideoBroadcaster broadcaster_;
   // |source_| is held here to be able to change the state of the source when
   // the VideoRtpReceiver is stopped.
   rtc::scoped_refptr<VideoTrackSource> source_;
   rtc::scoped_refptr<VideoTrackInterface> track_;
+  RtpReceiverObserverInterface* observer_;

[pthatcher1, 2016/06/08 17:35:55]

Same here.

+  bool received_first_packet_ = false;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_RTPRECEIVER_H_